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use std::io::{Write, stdout, stdin};
use chrysanthemum::*;
use chrysanthemum::ast::*;
fn main() {
println!("chrysanthemum");
let mut input = String::new();
loop {
println!("infer, check, or execute? (i/c/e)");
print!("\x1b[1m==> \x1b[22m");
stdout().flush().unwrap();
input.clear();
stdin().read_line(&mut input).unwrap();
match input.trim() {
"i" | "g" | "infer" => {
println!("enter partially annotated expression to fully infer");
print!("\x1b[1m====> \x1b[22m");
stdout().flush().unwrap();
input.clear();
stdin().read_line(&mut input).unwrap();
match simple::infer(Context::new(), parser::parse_lambda(&input).unwrap()) {
Ok(term) => println!("infers! {:?}", term),
Err(e) => println!("{:?}", e),
}
},
"c" | "t" | "check" => {
println!("enter fully annotated expression to typecheck");
print!("\x1b[1m====> \x1b[22m");
stdout().flush().unwrap();
input.clear();
stdin().read_line(&mut input).unwrap();
let kind = simple::infer(Context::new(), parser::parse(&input));
match kind {
Ok(kind) => {
match simple::check(Context::new(), parser::parse_lambda(&input).unwrap(), kind) {
Ok(_) => println!("checks!"),
Err(e) => println!("{:?}", e),
}
},
Err(_) => println!("failed to infer high-level type!")
}
},
"e" | "r" | "execute" | "run" => {
println!("enter expression to execute");
print!("\x1b[1m====> \x1b[22m");
stdout().flush().unwrap();
input.clear();
stdin().read_line(&mut input).unwrap();
match simple::execute(Context::new(), parser::parse_lambda(&input).unwrap()) {
Ok(term) => println!("{:?}", term),
Err(e) => println!("{:?}", e)
}
},
_ => println!("invalid option {}. please try again.", input.trim())
}
}
}
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